Can anywone help with the maker of this griffin vase ? Some books attribute this mould to Sowerby and the only others I have seen are either in vitro-porcelain or slag glass. This green colour of mine doesn't look like a Sowerby green, I have also seen this mould attributed to Edward Moore ?

Yes you are right, I sent pictures to the curator of Glass - Angus McDonald, at South Shields Museum, he has been writing a book about South Shields glass baron Edward Moore. He very kindly rang me and we had a long chat about this piece and he says it is by Moore.

Slack (p108) says there is no evidence that these are Sowerby (the colours are wrong) but that Edward Moore is likely as they are colours patented by Edward Moore

I think I've found the source of the Sowerby attribution. Barbara Morris states that: "a vase in this design was bought by the Museum of Decorative Arts in Prague direct from Sowerby & Co. in 1868." How true this is I've no idea but it's an interesting avenue to investigate. it could well be that this was a mix-up but then again there's always the possibility that the Sowerby attribution is correct or that the pattern was made by both firms.